code: def shallow_copy(
      df: DataframeLike, engine: Engine, debug: bool = False
  ) -> DataframeLike:
      if engine in [Engine.DASK, Engine.DASK_CUDF]:
          df2 = df.copy()
      else:
          df2 = df.copy(deep=False)
  
      if debug and (engine in [Engine.DASK, Engine.DASK_CUDF]):
          df2 = df2.persist()
          df2.compute()
  
      return df2
  
imports: from typing import TYPE_CHECKING, Any, Dict, List, Optional
  from .Engine import Engine, DataframeLike, DataframeLocalLike
  import numpy, pandas, pyarrow, sys
  from .util import setup_logger
label_desc: Use image node_id 19 for calling a global function with example usage: shallow_copy(df, engine, debug) and returns: df2